Emerson Rosemount CT5400, Installation, Operation And Maintenance Manual

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Replacing the gas temperature sensor Figure 7-29:
A. Stainless steel 316 male connector, Let-Lok tube fitting, 6 mm x male ISO tapered thread 1/4
in.
B. Gas temperature sensor wiring harness
C. Gas temperature sensor thermocouple
9. Inspect the replacement gas temperature sensor thermocouple (C) and associated
tube fitting (A) for signs of damage.
10. As shown in Figure 7-29 , use your fingers to push inwards the insulation around the
analysis cell. Fit the gas temperature sensor thermocouple (C) and tube fitting (A) to
the analysis cell. Apply a small quantity of Loctite 567 liquid PTFE compound to the
threads of the tube fitting before it is fitted. Secure the thermocouple by tightening
the tube fitting
spanner tight .
NOTICE
The Swagelok recommendation for pipe fittings of this size is to tighten the nut finger
tight and then tighten an additional one and a quarter (1-1/4) turns with a spanner.
11. Route the gas temperature sensor wiring harness (B) to connector block X2 on the
DIN rail using the route noted in Step 4. Connect the gas temperature sensor wiring
harness to connector block X2.
Troubleshooting and diagnostics
Installation, Operations, and Maintenance Manual 111